描述
Python join() 方法用于将序列中的元素以指定的字符连接生成一个新的字符串。
语法
join()方法语法:
str.join(sequence)
参数
- sequence -- 要连接的元素序列。
返回值
返回通过指定字符连接序列中元素后生成的新字符串。
实例
以下实例展示了join()的使用方法:
#!/usr/bin/python str = "-"; seq = ("a", "b", "c"); # 字符串序列 print str.join( seq );
以上实例输出结果如下:
a-b-c
实例2:
for field in obj._meta.fields: if update_fields is not None and field.name not in update_fields: continue property_name = ‘‘.join(x.capitalize() for x in field.name.split(‘_‘)) property_name = property_name[0].lower() + property_name[1:] if property_name in src_obj: value = src_obj[property_name] if value is not None and value != ‘‘: tp = type(field) if tp in (IntegerField, BigIntegerField) and is_int(value): setattr(obj, field.name, int(value)) elif tp in (DecimalField, ) and is_decimal(value): setattr(obj, field.name, float(value)) elif tp in (CharField, ): # 如果是个数组,则需要合并数组 if isinstance(value, list): setattr(obj, field.name, u‘,‘.join(unicode(v) for v in value)) else: setattr(obj, field.name, value[:field.max_length]) elif tp in (TextField, ): setattr(obj, field.name, value) elif tp in (DateField, ): setattr(obj, field.name, datetime.datetime.strptime(value, MTIME_DATE_FORMAT)) elif tp in (DateTimeField, ): setattr(obj, field.name, datetime.datetime.strptime(value, MTIME_DATETIME_FORMAT)) elif tp in (ForeignKey, ): setattr(obj, field.name, value) return obj
时间: 2024-12-11 00:17:09